<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="http://at.alicdn.com/t/font_1631655_nrz6a7xzrdi.css">
</head>
    <style>
        .box{
            width: 200px;
            height: 200px;
            position: absolute;
            top: 0;
            bottom: 0;
            margin: auto;
            background-color: #bfa;
        }
    </style>
<body>
    <i class="iconfont icon-right-arrow"></i>
    <div class="box">
        
    </div>
</body>
</html>